How can you unlock the SD card if the lock bottom is missing and your card is locked?

This maybe useful to anyone whose "lock" toggle has fallen off. The plastic toggle is there to activate a switch in the device (like in digital camera) not on the card. To get the device to see the card as unlocked, just glue a small piece of plastic to fill the slot in the side of the SD card casing. You will loose the SD card lock feature but at least you will be able to write data to the card again.

Also, if you don't feel like glueing just stick a piece of tape on the side that will work too. The below related link "Simple Fix for Memory Card Locked" illustrates the tape fix along with other troubleshooting tips for "memory card locked" or "memory card error" problems.